Insert for footwear



FIG. 1 is a first perspective view of an insert for footwear showing our new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is a side view of the opposite side of FIG. 5; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings illustrate portions of an insert for footwear that form no part of the claimed design. 

CLAIM The ornamental design for an insert for footwear, as shown and described. 